6G5-11372-1S Yamaha Bypass Cover 115HP | Genuine Used Part

🔧 Product Description

Genuine Yamaha Cooling-Water Bypass Cover No. 2 - Part Number: 6G5-11372-00-1S

A genuine used Yamaha bypass cover for selected V4 and V6 two-stroke outboard cooling systems.

The cover seals a cooling-water bypass passage in the cylinder block or crankcase assembly, allowing regulated coolant circulation during warm-up and normal engine operation.

⚙️ Key Features

• Genuine used Yamaha cooling-system cover
• Correct part number 6G5-11372-00-1S
• Factory description: Cover, Bypass 2
• Used on selected 115HP and larger V4 / V6 engines
• Original cast-aluminium Yamaha component

🚤 Compatibility

Commonly used on

• Yamaha V4 and V6 two-stroke cooling-water bypass systems
• Cylinder-block and crankcase cooling passages

Typically suits

• Engine models:
• Yamaha 115HP two-stroke
• Yamaha C115 two-stroke
• Yamaha 130HP two-stroke
• Yamaha 150HP V6 two-stroke
• Yamaha 175HP V6 two-stroke
• Yamaha 200HP V6 two-stroke
• Yamaha 225HP V6 two-stroke
• Engine diagrams specifying bypass cover 6G5-11372-00-1S
• HP Range: Approximately 115HP - 225HP
• Engine Type: Yamaha carburetted, EFI and selected HPDI V4 / V6 two-stroke outboard
• Year Range: Model and serial-number dependent

🔌 Function

The cover seals the cooling-system bypass cavity and helps direct cooling water through the correct block and cylinder-head passages.

⚠️ Common Signs of Failure

• Cooling water leaks around the cover
• Cover is cracked or heavily corroded
• Mounting surface is distorted
• Gasket repeatedly fails
• Cooling-system pressure is lost
• Salt deposits restrict the bypass passage

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 6G5-11372-00-1S → Supersedes 6G5-11372-00-5B
• 6G5-11372-00-5B earlier painted OEM reference
• 6G5-11372-00-9M related earlier colour reference

OEM / Related Numbers

• 6G5-11372-00-1S
• 6G511372001S
• 6G5-11372-00-5B
• 6G511372005B
• 6G5-11372-00-9M
• 6G5-11372
• Related bypass-cover gasket as specified by engine model

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated